COMP SCI 640 Lecture Notes - Lecture 2: Circuit Switching, Channel Access Method, Packet Switching
16 Sep 2016
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G : {v,e} : graph of vertices v and edges e. Where v is set of vertices corresponding to nodes (pc, mobile, switch, router) E is set of edges corresponding to fiber optic cable, twisted pair copper, air (in case of wireless networks) This can be further categorized as: simple network: A point to point network i. e one node communicating with another node: multiple access network: Multiple nodes communicating with each other over a single bus (a bus is any communication system that transfers data between computers) This kind of network is typically found in lans: switched networks: A set of switches connects a group of computers to each other. i) There are dedicated paths between hosts maintained via signaling protocol. In practice: a single physical wire between nodes a and b: packet switched networks: Data are bundled up and transmitted via well-defined units. Then transmitted through shared medium: network of switched networks:
